I've got 19/29 Olympic disciplines 50p's and the £2 handover coin and I'm quite impressed by the designs, done by members of the public. I've got loads of swapsies too but hope to exchange in Eastbourne. I'm asking a local 'Happy Shopper' to keep an eye out for them with a promise of a bottle of wine for them all (7 staff) when I get the lot. Ouch!
One thing does puzzle me is that they are dated 2011. I wonder if the royal mint are producing a second set dated 2012, which would make more sense.